The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 02, 1991
Filed:
Apr. 14, 1989
Wu-Hsiung E Hsu, Gloucester, Ontario, CA;
Other;
Abstract
Disclosed is a method of making a dimensionally stable composite board product made from a mixture of particles of a cellulose material and binder and a composite board so produced by such method. Dimensional stability is in reference to the resistance to thickness swelling when the board is subjected to high humidity or moisture conditions. The method and composite board displaying the attribute of improved dimensional stability involves subjecting the particles of cellulosic material to a pressurized steam treatment and then making the composite board under heat and pressure. When compared to conventional composite board that has not been subjected to the pretreatment, the difference in thickness swelling is significant.